Multiply Using One of the Rules for the Square of a Binomial

Multiple Choice

Multiply using one of the rules for the square of a binomial. Assume any variable exponents represent whole numbers.
- $$( 5 x + 3 y ) ^ { 2 }$$

A) $25 x ^ { 2 } + 9 y ^ { 2 }$
B) $5 x ^ { 2 } + 30 x y + 9 y ^ { 2 }$
C) $5 x ^ { 2 } + 9 y ^ { 2 }$
D) $25 x ^ { 2 } + 30 x y + 9 y ^ { 2 }$